205368397 has 16 divisors (see below), whose sum is σ = 240325120. Its totient is φ = 173793600.

The previous prime is 205368367. The next prime is 205368409. The reversal of 205368397 is 793863502.

It is a cyclic number.

It is not a de Polignac number, because 205368397 - 2¹⁹ = 204844109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205368337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5754 + ... + 21067.

It is an arithmetic number, because the mean of its divisors is an integer number (15020320).

Almost surely, 2^205368397 is an apocalyptic number.

It is an amenable number.

205368397 is a deficient number, since it is larger than the sum of its proper divisors (34956723).

205368397 is a wasteful number, since it uses less digits than its factorization.

205368397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26884.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 205368397 is about 14330.6802699663. The cubic root of 205368397 is about 589.9898466126.

The spelling of 205368397 in words is "two hundred five million, three hundred sixty-eight thousand, three hundred ninety-seven".